Electrical functionalities of poly(n‐hexyl isocyanate) in solid phase

Abstract

AbstractWe report electrical functionalities of a rigid rod‐like helical polymer, poly(n‐hexyl isocyanate) (PHIC), in the solid state. Our experimental results of a displacement (D)–field (E) hysteresis and a measurement of pyroelectric signal proved that the PHIC system was electrically active. From the D–E hysteresis loop, coercive field and remanent polarization were determined to be 6.8 MV/m and 3.0 mC/m2, respectively, at 80 °C. The pyroelectric coefficient was 9.5 mC/m2 K for the sample for which the poling treatment was conducted at 80 °C with the field 20 MV/m. The dipole ordering of the CO dipoles attached to the main chain was responsible for these electrical activities. Relatively small amounts of the remanent polarization and the pyroelectric coefficient possibly resulted from the short‐range dipole ordering in the noncrystalline phase. © 2005 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 43: 3093–3099, 2005